py3k: Rename .next() to __next__(), add python2.x compatibility alias

bindings/python/notmuch/database.py

@@ -925,7 +925,7 @@ class Filenames(object):
     _move_to_next.argtypes = [NotmuchFilenamesP]
     _move_to_next.restype = None
 
-    def next(self):
+    def __next__(self):
         if self._files_p is None:
             raise NotmuchError(STATUS.NOT_INITIALIZED)
 
@@ -936,6 +936,7 @@ class Filenames(object):
         file = Filenames._get(self._files_p)
         self._move_to_next(self._files_p)
         return file
+    next = __next__ # python2.x iterator protocol compatibility
 
     def __len__(self):
         """len(:class:`Filenames`) returns the number of contained files

bindings/python/notmuch/message.py

@@ -158,7 +158,7 @@ class Messages(object):
     _move_to_next.argtypes = [NotmuchMessagesP]
     _move_to_next.restype = None
 
-    def next(self):
+    def __next__(self):
         if self._msgs is None:
             raise NotmuchError(STATUS.NOT_INITIALIZED)
 
@@ -169,6 +169,7 @@ class Messages(object):
         msg = Message(Messages._get(self._msgs), self)
         self._move_to_next(self._msgs)
         return msg
+    next = __next__ # python2.x iterator protocol compatibility
 
     def __nonzero__(self):
         """

bindings/python/notmuch/tag.py

@@ -89,7 +89,7 @@ class Tags(object):
     _move_to_next.argtypes = [NotmuchTagsP]
     _move_to_next.restype = None
 
-    def next(self):
+    def __next__(self):
         if self._tags is None:
             raise NotmuchError(STATUS.NOT_INITIALIZED)
         if not self._valid(self._tags):
@@ -98,6 +98,7 @@ class Tags(object):
         tag = Tags._get(self._tags).decode('UTF-8')
         self._move_to_next(self._tags)
         return tag
+    next = __next__ # python2.x iterator protocol compatibility
 
     def __nonzero__(self):
         """Implement bool(Tags) check that can be repeatedly used

bindings/python/notmuch/thread.py

@@ -116,7 +116,7 @@ class Threads(object):
     _move_to_next.argtypes = [NotmuchThreadsP]
     _move_to_next.restype = None
 
-    def next(self):
+    def __next__(self):
         if self._threads is None:
             raise NotmuchError(STATUS.NOT_INITIALIZED)
 
@@ -127,6 +127,7 @@ class Threads(object):
         thread = Thread(Threads._get(self._threads), self)
         self._move_to_next(self._threads)
         return thread
+    next = __next__ # python2.x iterator protocol compatibility
 
     def __len__(self):
         """len(:class:`Threads`) returns the number of contained Threads